Testing with the iAP-205. Created an SSID with network assigned DHCP, manually assigned VLAN ID. The idea is that the client connects to the SSID, gets DHCP from a firewall on the network that is present in the assigned VLAN, and goes on about its business. I've done this before on iAP-105 installs with no issue.
New iAP-205 out of the box, first thing I did was update to the latest release, 6.4.2.0-4.1.1.1. DHCP requests never reach the DHCP server. Loads of troubleshooting later, that broadcast traffic is not getting there. Statically assigned IP on the client can pass traffic to the DHCP server.
Finally, in a state of exasperation, downgraded to 6.4.2.0-4.1.1.0, the only other release for iAP-205 that's available. Reboot, BAM! it works.
I'm assuming this is a bug. Anyone else encountered it? Doesn't seem to be too far-fetched a use case.